Index: trunk/ppImage/src/ppFocusFitFWHM.c
===================================================================
--- trunk/ppImage/src/ppFocusFitFWHM.c	(revision 8751)
+++ trunk/ppImage/src/ppFocusFitFWHM.c	(revision 10857)
@@ -11,6 +11,5 @@
     psPolynomial1D *poly = psPolynomial1DAlloc (PS_POLYNOMIAL_ORD, 2);
 
-    poly = psVectorFitPolynomial1D (poly, NULL, 0, fwhm, NULL, focus);
-    if (!poly) {
+    if (!psVectorFitPolynomial1D (poly, NULL, 0, fwhm, NULL, focus)) {
 	psError (PS_ERR_UNKNOWN, false, "failed to fit focus/fwhm trend; invalid image data?");
 	return false;